Updated Docker images (9.18, 9.20, 9.21) - now based on Alpine Linux

[Ondřej Surý]

> On 27. 8. 2024, at 18:57, Marc <Marc at f1-outsourcing.eu> wrote:
> 
> Afaik  apk del \ does not free up space still. 

Right. That was not really my intention though. I wanted to reduce
the amount of cruft installed in the image.  The less binary stuff
around, the less possible attack surface.

But apk --no-cache should work I guess.

> If you work with builder phase, you can probably shave of some MB's


I think that's too complicated to use two phases, but I think the next update
should reduce the image size a little bit.  It was ~170 MB before and the
reduced (compressed) size is 130 MB.

But I get it - the base alpine:latest is only 3 MB, that's quite a difference.

Ondrej
--
Ondřej Surý (He/Him)
ondrej at isc.org

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